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SERVICE MANUAL
5 CHANNEL
POWER AMPLIFIER
GFA-7605
TABLE OF CONTENTS
Introduction . . . . . . . . . . . . . . . . 1
Test Procedures . . . . . . . . . . . . . 1
Parts List . . . . . . . . . . . . . . . . . . 2
Voltage Conversion . . . . . . . . . . . . 5
Specifications . . . . . . . . . . . . . . . 7
PCB Layouts. . . . . . . . . . . . . . . . . . 8
Schematic . . . . . . . . . . . . . . . . . 9
8551 East Anderson Drive,Suite 105
Scottsdale, Arizona 85255
USA
Tel: 480-607-2277
Fax: 480-348-9876
Web: http://www.adcom.com
INTRODUCTION
This service manual is intended to assist trained and qualified technical personnel in verifying the
performance of, adjusting, and repairing the ADCOM GFA-7605 amplifier. The procedures described
here are not intended for persons unfamiliar with the appropriate safety and test procedures.
WARNING
THERE ARE POTENTIALLY LETHAL VOLTAGES WITHIN THE GFA-7605 AMPLIFIER WHICH WILL
BE ACCESSIBLE ONCE ITS TOP COVER IS REMOVED. DO NOT ATTEMPT FAMILIARIZATION,
INSPECTION, OR ANY PROCEDURE WHATSOEVER UNLESS YOU HAVE DISCONNECTED THE
GFA-7605 FROM THE WALL AC OUTLET OR OTHER SOURCE OF AC POWER AND THE POWER-
SUPPLY CAPACITORS ARE COMPLETELY DISCHARGED. THESE INSTRUCTIONS ARE
PROVIDED FOR USE ONLY BY COMPETENT TECHNICAL PERSONNEL. DO NOT UNDERTAKE
ANY SERVICE PROCEDURES IN THE GFA-7605 UNLESS YOU ARE TECHNICALLY QUALIFIED
TO DO SO.
TEST PROCEDURES